On the 21st floor, it smelled like somebody was burning a pile of leaves with a lot of styrene plastic car models hidden in it. @BeijingAir
11-22-2012 00:00; PM2.5; 404.0; 436; Hazardous (at 24-hour exposure at this level)
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On a scale of 1-500, Beijing was 436 half an hour ago, on one scale of awfulness.
@BeijingAir ".. Hazardous (at 24-hour exposure ..)"Thanks. Twitter will use this to make your timeline better. UndoUndo
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